CN111620508A

CN111620508A - Vertical electric flocculation MBR membrane oil-water separation purifier

Info

Publication number: CN111620508A
Application number: CN201910144454.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Beijing Fengshuntong Environmental Protection Technology Co ltd
Current assignee: Beijing Fengshuntong Environmental Protection Technology Co ltd
Priority date: 2019-02-27
Filing date: 2019-02-27
Publication date: 2020-09-04

Abstract

The invention discloses a vertical type electric flocculation MBR membrane oil-water separation and purification device which comprises a vertical cabinet type box body and a controller, wherein a filter chamber, an electrolytic flocculation chamber and an MBR membrane water purification chamber are arranged inside the vertical cabinet type box body, and the electrolytic flocculation chamber comprises an electrolytic flocculation chamber I and an electrolytic flocculation chamber II. The second electrolytic flocculation chamber is connected with the MBR membrane water purification chamber through a water guide pipe, and purified and filtered water in the MBR membrane water purification chamber is discharged from a water purification outlet. The vertical electrocoagulation MBR membrane oil-water separation and purification device adopting the structure can solve the problems of low oil stain removal efficiency and large occupied space of the device of the prior equipment, can treat 4 tons of sewage per hour, and can ensure that the treated water quality can reach five detection indexes required by the state.

Description

Vertical electric flocculation MBR membrane oil-water separation purifier

Technical Field

The invention belongs to the technical field of water-oil separation devices, and particularly relates to a vertical type electrocoagulation MBR membrane oil-water separation and purification device for treating sewage in catering industry.

Background

A large amount of kitchen swill is generated every day in canteens, restaurants and the like, mainly contains oil, water, organic matters and other substances, and can have great influence on the environment if the swill is directly discharged into urban sewers without treatment.

The existing oil-water separation equipment and method mainly comprise an oil separation tank, coagulation and chemical feeding and an air floatation method. The oil separation tank achieves the purpose of oil-water separation by utilizing the density difference between oil and water in sewage, but the method has large floor area, low oil removal efficiency and overlong retention time of water quality in the oil separation tank, so that organic matters are easy to rot and odor is generated. The coagulating agent adding method is that aluminum salt, iron salt and other coagulating agents are added into the sewage to lead colloidal particles in the sewage to be mutually bonded and aggregated, and grease and suspended particles are converted into sludge to be precipitated; the addition amount of the coagulant is not easy to control, and the added medicament is easy to generate secondary pollution. The air floatation method is to use highly dispersed micro-bubbles as carriers to adhere suspended matters, and to float oil stains and the like to the water surface through the bubbles so as to realize the purpose of removing the oil stains; however, the method has high operation components, large scum amount and difficult grease recovery.

Disclosure of Invention

The invention aims to provide a vertical type electric flocculation MBR membrane oil-water separation and purification device for treating sewage in catering industry, which solves the problems that the existing equipment is low in oil stain removal efficiency and filtered impurities cannot be automatically discharged.

In order to achieve the purpose, the invention provides a vertical type electric flocculation MBR membrane oil-water separation and purification device, which comprises a box body and a controller, wherein a filter chamber, an electrolytic flocculation chamber and an MBR membrane water purification chamber are arranged inside the vertical type box body; the electrolytic flocculation chamber comprises a first electrolytic flocculation chamber and a second electrolytic flocculation chamber, a partition plate is arranged between the first electrolytic flocculation chamber and the second electrolytic flocculation chamber, at least one pair of electrode plates are respectively arranged in the first electrolytic flocculation chamber and the second electrolytic flocculation chamber, the electrode plates are electrically connected with the controller, an oil scraping device is arranged at the top of the electrolytic flocculation chamber, an oil collecting tank is arranged in the second electrolytic flocculation chamber, floating oil in the electrolytic flocculation chamber is collected into the oil collecting tank by the oil scraping device, and an oil discharge port is formed in the oil collecting tank; the second electrolytic flocculation chamber is connected with the MBR membrane water purification chamber through a water guide pipe, two ends of the MBR membrane are connected with the water guide pipe, and two ends of the water guide pipe are respectively provided with a water suction pump for simultaneously pumping water; the MBR membrane water purification chamber is used for purifying water and is provided with the water outlet.

Preferably, the height of the vertical cabinet type box body is approximately 110cm-160cm, the width of the vertical cabinet type box body is approximately 40cm-50cm, and the length of the vertical cabinet type box body is approximately 50cm-80 cm. .

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: the filter chamber can be used for removing large residues in sewage through primary filtration.

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: 12-20 pairs of electrode plates are respectively arranged in the first electrolytic flocculation chamber and the second electrolytic flocculation chamber, and anode plates and cathode plates of the electrolytic plates are alternately distributed.

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: the anode plate of the electrode plate is an aluminum plate, the cathode plate is a ruthenium-iridium alloy plate or other metal alloy plates, the inner electrode plate of the first electrolytic flocculation chamber is connected with low-voltage 3.6V coupling direct current, and the connection of the inner electrolytic plate of the second electrolytic flocculation chamber is properly higher than that of the coupling direct current of the first chamber.

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: and a heating rod and an aeration disc are arranged in the first electrolytic flocculation chamber, the heating rod is electrically connected with the controller, the aeration disc is positioned below the electrode plate, and the aeration disc is connected with an air pump.

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: the oil scraping device comprises a rotating shaft which is rotatably connected with the box body, chain wheels are arranged at two ends of the rotating shaft, the chain wheels on the two rotating shafts are connected through a chain, and a plurality of scraping plates are uniformly arranged on the chain; the motor drives the rotating shaft to rotate through the speed reducer, and the motor is electrically connected with the controller.

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: the sewage after the electrocoagulation treatment is connected with two water pumps through a water guide pipe and is connected with two ends of an MBR membrane, and the MBR membrane filters the sewage after the electrocoagulation treatment to an MBR membrane water purification chamber under the bidirectional action of the two water pumps.

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: the two water pumps work simultaneously to reversely flush the MBR membrane.

Preferably, the vertical type electric flocculation MBR membrane oil-water separation and purification device is characterized in that: the side bottom of filter chamber is provided with the drain, the side bottom of MBR membrane clean water chamber is provided with the outlet.

According to the vertical type electrocoagulation MBR membrane oil-water separation and purification device, a screw rod is arranged in a filter screen of a filter chamber, one end of the screw rod is connected with a motor, and the motor is electrically connected with a controller; the other end is inserted into the impurity discharging port which is communicated with the filter screen. The motor is started, the screw rod rotates under the action of the motor, impurities filtered in the filter screen can be automatically discharged through the impurity discharging port, and manual cleaning is not needed. The electrolytic flocculation chamber comprises a first electrolytic flocculation chamber and a second electrolytic flocculation chamber, 12-20 pairs of electrode plates are respectively arranged in the first electrolytic flocculation chamber and the second electrolytic flocculation chamber, the anode plates are aluminum plates, the cathode plates are ruthenium-iridium alloy plates or other metal alloy plates, the anode plates and the cathode plates are alternately distributed, and the electrolytic impurity removal efficiency is high. Electrolyzing an aluminum plate to form a polyaluminium flocculant, combining pollutant particles in the wastewater with the flocculant to aggregate into clusters, and settling at the bottom of an electrolytic flocculation chamber; organic matters are decomposed into small molecules through anodic oxidation and are adsorbed by a flocculating agent; the oil or slight floc which is difficult to settle floats on the water surface under the action of the hydrogen separated out from the cathode, and then is hung into an oil collecting tank through an oil scraping device to be discharged. One middle electrode plate of the electrolytic flocculation chamber is connected with 3.6V coupling direct current for electrolysis. After the electrolysis of the first electrolytic flocculation chamber is finished, sewage is discharged into the second electrolytic flocculation chamber, an inner electrode plate of the second electrolytic flocculation chamber is connected with coupling direct current slightly higher than the coupling direct current connected into the first electrolytic flocculation chamber for complementary electrolysis, and then the second electrolytic flocculation chamber is led to an MBR (membrane bioreactor) membrane through two water pumps and a water guide pipe simultaneously to perform bidirectional backwashing filtration. The electric flocculation high-efficiency water-oil separator can finish the treatment of 4 tons of sewage every hour.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a vertical electrocoagulation MBR membrane oil-water separation and purification device of the present invention;

FIG. 2 is a top view of an embodiment of the vertical type electric flocculation MBR membrane oil-water separation and purification device of the present invention.

FIG. 3 is a schematic diagram of an oil collecting tank of an embodiment of the vertical electrocoagulation MBR membrane oil-water separation and purification device of the present invention;

reference numerals

1. A box body; 2. a cover plate; 3. a water inlet; 4. a water outlet; 5. a filtering chamber; 6. a first electrolytic flocculation chamber; 7. a second electrolytic flocculation chamber; 8. a purified water buffer chamber; 9. a controller; 10. a filter screen; 11. a screw rod; 12. a first clapboard; 13. a baffle plate; 14. a second clapboard; 15. a third clapboard; 16. a rotating shaft; 17. a sprocket; 18. a chain; 19. a squeegee; 20. an oil collecting tank; 21. folding the plate; 22. a flow guide port; 23. a sewage discharge port; 24. an oil discharge port; 25. a water outlet; 26. an electrode plate; 27. a handle; 28. a through hole; 29. an aeration disc; 30. a heating rod; 31. an MBR membrane water purification chamber; 32. MBR membrane; 33. a water conduit; 34 pump water.

Detailed Description

Examples

The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation manner and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.

Fig. 1 is a schematic structural diagram of an embodiment of a vertical electrocoagulation MBR membrane oil-water separation and purification device of the present invention, and fig. 2 is a schematic internal structural diagram of an embodiment of a vertical electrocoagulation MBR membrane oil-water separation and purification device of the present invention. As shown in fig. 1 and 2, the vertical type electric flocculation MBR membrane oil-water separation and purification device comprises a box body 1 and a controller 9, wherein the controller 9 is fixed on the outer side wall of the box body 1. The top of box 1 is provided with apron 2, is provided with handle 27 on apron 2, conveniently opens apron 2 and overhauls and clear up the box 1 is inside. One end of the box body 1 is provided with a water inlet 3, the other end is provided with a water outlet 4, the water inlet 3 is positioned on the upper part of the box body 1, the water outlet 4 is positioned in the middle of the box body 1, and the water outlet 4 is arranged at a certain height away from the ground, so that sewage can be subjected to sufficient electrolytic flocculation impurity removal.

The inside of the box body 1 is provided with a filter chamber 5, an electrolytic flocculation chamber and an MBR membrane water purification chamber 31. A first partition plate 12 is arranged between the filtering chamber 5 and the electrolytic flocculation chamber, two sides of the first partition plate 12 are fixedly connected with the inner wall of the box body 1, and a flow guide opening 22 communicated with the electrolytic flocculation chamber and the filtering chamber 5 is formed in the bottom of the first partition plate 12. An inclined baffle 13 is arranged above the first partition plate 12, two ends of the baffle 13 are fixedly connected with the inner side wall of the box body 1, the included angle between the baffle 13 and the vertical direction is 20-30 degrees, and the preferred embodiment is 24 degrees. . The horizontal distance between the top of the first partition plate 12 and the baffle plate 13 is not more than 3 cm. The baffle 13 can prevent sewage from directly entering the electrolytic flocculation chamber and can also prevent foam impurities floating on the water surface generated by electrolysis in the electrolytic flocculation chamber from flowing into the filtering chamber 5. The top of the filter chamber 5 is provided with a filter screen which is communicated with the water inlet 3. The filter screen is the infundibulate structure, is provided with hob 11 in the filter screen, and the one end of hob 11 is connected with the motor, and the motor is fixed on the outside lateral wall of box 1, and the motor links with 9 electricity of controller, and hob 11 passes through the bearing rotation with box 1 and is connected. The filter screen 10 preliminarily filters the sewage entering the filter chamber 5 to filter large-particle impurities. When the residual sundries filtered in the filter screen 10 need to be cleaned, the sundry discharging port is opened, the motor drives the screw rod 11 to rotate, the sundries are discharged through the sundry discharging port under the action of the screw rod 11, the automatic cleaning of the sundries is realized, and the manual cleaning is not needed. The sewage entering from the water inlet 3 flows into the filtering chamber 5 after being preliminarily filtered by the filtering net, and the sewage in the filtering chamber 5 flows into the electrolytic flocculation chamber through the flow guide opening at the bottom of the baffle plate. A sewage draining outlet 23 is arranged at the bottom of the side surface of the filtering chamber 5, and impurities settled at the bottom of the filtering chamber 5 are discharged through the sewage draining outlet 23.

The electrolytic flocculation chamber is positioned in the middle of the tank body 1, and a third partition plate 15 is arranged between the electrolytic flocculation chamber and the MBR membrane water purification chamber 31. The electrolytic flocculation chamber comprises a first electrolytic flocculation chamber 6 and a second electrolytic flocculation chamber 7, a second partition plate 14 is arranged between the first electrolytic flocculation chamber 6 and the second electrolytic flocculation chamber 7, the second partition plate 14 is a partition plate with adjustable height, the first electrolytic flocculation chamber 6 and the second electrolytic flocculation chamber 7 are independently separated by the second partition plate 14 in an extending mode, and sewage in the first electrolytic flocculation chamber 6 can be conveniently discharged into the second electrolytic flocculation chamber 7 by shortening the second partition plate 14. At least one pair of electrode plates 26 are respectively arranged in the first electrolytic flocculation chamber 6 and the second electrolytic flocculation chamber 7, the electrode plates 26 are electrically connected with the controller 9, and 12 pairs of electrolytic plates are respectively arranged in the first electrolytic flocculation chamber 6 and the second electrolytic flocculation chamber 7 in the embodiment. The anode plate of the electrode plate 26 is an aluminum plate, the cathode plate is an iridium titanium alloy plate, and the aluminum plate and the iridium titanium alloy plate are distributed at intervals, so that the efficiency of electrolytic flocculation and impurity removal is improved. The electrode plate 26 in the first electrolytic flocculation chamber 6 is connected with the 3.6V coupling direct current for electrolysis, the sewage flows into the second electrolytic flocculation chamber 7 through the second height-adjustable partition plate 14 after the electrolysis in the first electrolytic flocculation chamber 6 is completed, and the electrode plate 26 in the second electrolytic flocculation chamber 7 is connected with the coupling direct current which is slightly higher than the first 6 switch-on electrolytic flocculation chamber for supplementary electrolysis, so that the oil stain and impurities in the sewage can be more effectively removed. In the electrolytic flocculation chamber, an aluminum plate is electrolyzed to form a polyaluminium flocculant, and pollutant particles in the wastewater are combined with the flocculant to aggregate into clusters and are settled at the bottom of the electrolytic flocculation chamber; organic matters are decomposed into small molecules through anodic oxidation and are adsorbed by a flocculating agent; the oil or slight floc which is difficult to settle floats on the water surface under the action of hydrogen separated out from the cathode, and the cathode ruthenium-iridium alloy plate or other metal alloy plates can also generate oxygen.

And an oil scraping device is arranged at the top of the electrolytic flocculation chamber and is positioned above the second partition plate 14. The oil scraping device comprises two rotating shafts 16 which are rotatably connected with the box body 1, chain wheels 17 are fixed at two ends of each rotating shaft 16, and the chain wheels 17 on the two rotating shafts 16 are connected through chains 18. A plurality of scrapers 19 are uniformly arranged on the chain 18, in this embodiment, the number of the scrapers 19 is 6, and both ends of each scraper 19 are respectively fixed on the two chains 18. The motor drives one of the rotating shafts 16 to rotate through the speed reducer, and the rotating shaft 16 drives the other rotating shaft 16 to synchronously rotate through the cooperation of the chain wheel 17 and the chain 18, so that the two chains 18 synchronously move. The motor is electrically connected to the controller 9.

The bottom of the electrolytic flocculation chamber I6 is provided with a heating rod 30, the heating rod 30 is provided with a temperature adjusting device, and the temperature adjusting device is electrically connected with the controller 9. The heating rod 30 can heat the sewage in the electrolytic flocculation chamber I6 to prevent oil stain from solidifying. The bottom of the electrolytic flocculation chamber I6 is also provided with an aeration disc 29, the aeration disc 29 is positioned below the electrode plate 26, and the aeration disc 29 is made of high-grade rubber and has unidirectional air conductivity. The aeration disc 29 is connected with an external air pump, and the air pump is electrically connected with the controller 9. When the air pump is operated, the aeration disc 29 generates small bubbles in the sewage, so that the sewage is more fully electrolyzed under the action of the electrode plate 26. An oil collecting tank 20 is arranged in the second electrolytic flocculation chamber 7, and the oil collecting tank 20 is positioned at one end of the oil scraping device. The top of the oil collecting tank 20 is provided with an inclined folded plate 21 at one side close to the oil scraping device, and the scraping plate 19 is used for hanging the oil and sundry foam floating on the water surfaces of the first electrolytic flocculation chamber 6 and the second electrolytic flocculation chamber 7 into the oil collecting tank 20 through the folded plate 21 and then discharging the oil and sundry foam through an oil discharging port 24 at the bottom of the oil collecting tank 20. Fig. 3 is a schematic structural diagram of an oil collecting tank 20 of an embodiment of the vertical type electrocoagulation MBR membrane oil-water separation and purification device of the present invention. As shown in FIG. 3, a funnel-shaped oil collecting hopper is arranged at the top end of the interior of the oil collecting tank 20, a through hole 28 is arranged at the bottom of the oil collecting hopper, and the foam containing oil and sundries flows into the interior of the oil collecting tank 20 through the oil collecting hopper and the through hole 28.

The water after oil removal and impurity removal in the electrolytic flocculation chamber enters the MBR membrane in a bidirectional way through the water suction pump 34 and the water guide pipe 33, and the water filtered by backwashing and pressurization enters the MBR membrane purification chamber 31. The purified water enters the purified water buffer chamber 8 and is discharged from the water outlet 25; the drain port 25 may also be used as a spot check port to check whether the water quality meets the drain standard. The water outlet 4 is positioned in the MBR membrane water purifying chamber 8, the water outlet 4 is opened after the water quality is qualified through detection, and the treated water is discharged out of the tank body 1 through the water outlet 4.

The cover plate 2 above the box body 1 is divided into two parts, namely a first cover plate positioned at the top of the filtering chamber 5 and a second cover plate positioned at the top of the electrolytic flocculation chamber and the MBR membrane water purification chamber 31, and handles 27 are arranged at the tops of the first cover plate and the second cover plate. The box body 1, the filter screen, the partition board inside the box body 1, the baffle 13, the oil collecting tank 20 and the like are all made of stainless steel.

Therefore, the electric flocculation high-efficiency water-oil separator adopting the structure can solve the problem of low oil stain removal efficiency of the existing equipment, impurities generated by filtration can be automatically discharged without manual cleaning, and the treated water quality can reach five detection indexes required by the state.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a vertical electric flocculation MBR membrane water oil separating purifier which characterized in that: the device comprises a vertical cabinet type box body and a controller, wherein a filter chamber, an electrolytic flocculation chamber and an MBR membrane water purification chamber are arranged inside the vertical cabinet type box body; the electrolytic flocculation chamber comprises a first electrolytic flocculation chamber and a second electrolytic flocculation chamber, a partition plate is arranged between the first electrolytic flocculation chamber and the second electrolytic flocculation chamber, at least one pair of electrode plates are respectively arranged in the first electrolytic flocculation chamber and the second electrolytic flocculation chamber, the electrode plates are electrically connected with the controller, an oil scraping device is arranged at the top of the electrolytic flocculation chamber, an oil collecting tank is arranged in the second electrolytic flocculation chamber, floating oil in the electrolytic flocculation chamber is collected into the oil collecting tank by the oil scraping device, and an oil discharge port is formed in the oil collecting tank; the second electrolytic flocculation chamber is connected with the MBR membrane water purification chamber through a water guide pipe, two ends of the MBR membrane are connected with the water guide pipe, and two ends of the water guide pipe are respectively provided with a water suction pump for simultaneously pumping water; the MBR membrane water purification chamber is used for purifying water and is provided with the water outlet.

2. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: the height of the vertical cabinet type box body is approximately 110cm-160cm, the width of the vertical cabinet type box body is approximately 40cm-50cm, and the length of the vertical cabinet type box body is approximately 50cm-80 cm.

3. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: the filter chamber can be used for removing large residues in sewage through primary filtration.

4. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: 12-20 pairs of electrode plates are respectively arranged in the first electrolytic flocculation chamber and the second electrolytic flocculation chamber, and anode plates and cathode plates of the electrolytic plates are alternately distributed.

5. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: the anode plate of the electrode plate is an aluminum plate, the cathode plate is a ruthenium-iridium alloy plate or other metal alloy plates, the inner electrode plate of the first electrolytic flocculation chamber is connected with low-voltage 3.6V coupling direct current, and the connection of the inner electrolytic plate of the second electrolytic flocculation chamber is properly higher than that of the coupling direct current of the first chamber.

6. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: and a heating rod and an aeration disc are arranged in the first electrolytic flocculation chamber, the heating rod is electrically connected with the controller, the aeration disc is positioned below the electrode plate, and the aeration disc is connected with an air pump.

7. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: the oil scraping device comprises a rotating shaft which is rotatably connected with the box body, chain wheels are arranged at two ends of the rotating shaft, the chain wheels on the two rotating shafts are connected through a chain, and a plurality of scraping plates are uniformly arranged on the chain; the motor drives the rotating shaft to rotate through the speed reducer, and the motor is electrically connected with the controller.

8. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: the sewage after the electrocoagulation treatment is connected with two water pumps through a water guide pipe and is connected with two ends of an MBR membrane, and the MBR membrane filters the sewage after the electrocoagulation treatment to an MBR membrane water purification chamber under the bidirectional action of the two water pumps.

9. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 8, which is characterized in that: the two water pumps work simultaneously to reversely flush the MBR membrane.

10. The vertical type electric flocculation MBR membrane oil-water separation and purification device of claim 1, which is characterized in that: the side bottom of filter chamber is provided with the drain, the side bottom of MBR membrane clean water chamber is provided with the outlet.